There are some information and documents of concrete laser screed, About the date and some authentication of the laser screed machine, if you want to download these files please check here.
Third party inspection report of the EV850-2T Concrete laser screed machine
The packing list of the EV850-2T concrete laser screed machine
The date sheet of the HIKING concrete laser screed machine
The CE authentication of HIKING concrete laser screed machine
The RoSH authentication of HIKING concrete laser screed machine
The RoSH inspection report of HIKING concrete laser screed machine